Custom WordPress Plugin Development
Custom WordPress plugin development adds the exact features your business needs when no off the shelf plugin fits. Maybe you need a booking system tied to your own rules, a connection to your CRM or accounting tool, or a custom workflow that saves your team hours each week. We build plugins that do that job cleanly, follow WordPress coding standards, and keep working through core updates. Stacking free plugins to fake a feature often leads to conflicts, slow load times, and security gaps. A purpose built plugin does one thing well and stays out of the way. We also document the code so any developer can maintain it later. If you have a feature in mind that your current setup cannot handle, we can build it.
Who this is for
- A business with a workflow no existing plugin handles, such as custom bookings, quotes or approvals
- A company that needs WordPress connected to its CRM, ERP, accounting, inventory or booking software
- A site running six plugins to do one job, and paying for the conflicts and slowdowns that come with it
- A team with an old custom plugin that nobody dares update
What's included
- Custom features built for your workflow
- Third party API and service integrations
- Code that follows WordPress plugin standards
- Admin screens your team can actually use
- Data handling built with security in mind
- Compatibility with your theme and plugins
- Clear documentation for future maintenance
- Updates and support as your needs change
Scope: what is in and what is usually separate
A fixed-scope quote only works if the scope is clear. This is how we usually draw the line; anything in the right column can be added and priced separately.
| Included in a typical quote | Quoted separately or not included |
|---|---|
| A written feature spec with inputs, rules and outputs | Third-party API access fees or subscriptions |
| Data design and any custom tables or post types | Changes to the external system you are connecting to |
| The plugin, built to WordPress coding standards | Theme or design work (quoted separately) |
| Admin screens and settings your team can use | Publishing to the WordPress.org directory (possible as an add-on) |
| Automated and manual testing, including update safety | Ongoing feature development (a retainer or plan) |
| Documentation and a handover session | Hosting or maintenance |
How we approach it
- Define. We write down exactly what the feature does: who uses it, what goes in, what rules apply, what comes out, and what happens when something fails. You get: a spec you sign off and a fixed quote.
- Design the data. We decide how data is stored, which WordPress APIs to use and how the plugin talks to any outside system, including authentication and rate limits. You get: a short technical design.
- Build. We code the plugin following WordPress standards, with sanitized inputs, capability checks, nonces and clean admin screens. You get: a working plugin on staging.
- Test. We test the happy path, the edge cases and failure modes, run it against the latest WordPress and PHP versions and check it plays well with your theme and plugins. You get: a test log and fixes.
- Deliver. We install on production, monitor the first days and walk your team through the admin side. You get: the plugin, documentation and the repository.
What you receive at handover
- Plugin source in a Git repository you own
- The feature spec and technical design
- Admin documentation for your team
- Developer notes so anyone can maintain it
- A test log covering edge cases and update safety
- A defect warranty period on what we built
Custom plugin, existing plugin or custom code in the theme?
Custom code is not always the answer, and we say so when it is not. The choice usually comes down to how unusual the requirement is and how long it has to last.
| Option | When it fits |
|---|---|
| A well-maintained existing plugin | Your need is common (forms, SEO, caching, basic bookings) and the plugin is actively supported. We recommend and configure it. |
| An existing plugin plus a small custom add-on | The plugin does 80 percent of the job and you need one rule, field or integration it lacks. |
| A fully custom plugin | The workflow is specific to your business, connects to internal systems or would need four or more plugins to approximate. |
| Custom code in the theme | Only for presentation logic tied to the theme. Business logic belongs in a plugin so it survives a redesign. |
Technologies we use
- WordPress
- PHP
- REST API
- MySQL
- ACF
- JavaScript
- Gutenberg
- cURL
What drives the cost
We quote fixed-scope after a free consultation rather than publishing a rate card, because the same service can be a small job or a large one. These are the factors that move the number.
- Number of rules and edge cases. Every "except when" in the spec is code and a test. Simple features are cheap; workflows with many conditions are not.
- External integrations. Each API has its own authentication, limits and failure modes, and each needs test accounts and error handling.
- Admin interface. A settings page is quick. Full management screens with lists, filters and exports take longer.
- Data volume. Features that handle thousands of records need custom tables, indexing and background processing.
- Compatibility scope. Supporting several themes, multisite or older PHP versions widens testing.
- Security and privacy requirements. Handling personal or payment data adds review, encryption and logging work.
See the pricing page for how we scope and quote, or send a brief through the contact page for a written estimate.
How long it takes
Small plugins and integrations take 1 to 3 weeks. Workflow plugins with admin screens and one or two integrations run 3 to 8 weeks.
- How settled the spec is before we start.
- Access to sandbox or test accounts for any external API.
- The number of edge cases and failure modes to cover.
- Whether the plugin must be built to publish publicly.
Risks and how we manage them
- The plugin breaks on a WordPress update. We use public APIs only, avoid core hacks and test against the current and upcoming WordPress release.
- Security holes. Input sanitization, output escaping, capability checks and nonces on every action, plus a review before release.
- A dependency on one developer. Documented code and a spec mean any WordPress developer can pick it up later.
A worked example (illustrative)
Illustrative only. A tutoring company takes bookings by email and re-keys them into its CRM. It needs a booking form with tutor availability rules, a deposit through its existing gateway and a record pushed to the CRM. That is one week to define and design, two to three weeks to build and test against the CRM sandbox, and a fourth week to go live and monitor.
Why choose us
- Purpose built features instead of plugin stacks
- Fewer conflicts and cleaner performance
- Secure handling of your data and integrations
- Documented code any developer can maintain
FAQ
Frequently asked questions
When no existing plugin does the job, or when stacking several plugins causes conflicts, slowness, or security gaps. A custom plugin built for your exact need is usually cleaner, faster, and easier to maintain over time.
Yes. We build integrations with CRMs, accounting tools, booking systems, and other services through their APIs, so data moves between WordPress and your tools automatically instead of by manual entry.
Yes. We build to WordPress coding standards and avoid fragile shortcuts, so the plugin keeps working through core and plugin updates. We also offer support plans to handle any future changes.
Yes. You own the code we build for you, and we deliver it with documentation so any qualified developer can maintain or extend it later. You are never locked in to us.
Yes. We review the existing code, find the issues, and either repair or rebuild it depending on its state. We are honest about which path gives you better value in the long run.
Yes. Custom shipping methods, pricing rules, checkout fields, order workflows and fulfilment integrations are among the most common plugin requests we get. They are built on the WooCommerce APIs so they survive store updates.
We can prepare a plugin for the public directory, including the readme, licensing and coding-standard checks the review team expects. Most client plugins stay private, which is simpler and quicker.
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